Insulator.



PATENTED JAN. 1, 1907. A.J0HNS0N. INSULATQR.

APPLIGATION FILED FEB.7, 1906.

5 wenlioz .fa/M5022;

Hgh/Od my wi bue-ooe Mffw . @Hannut UNITED STATES .PATENT OFFICE.

ALFRED JOHNSON, OF QUINUY,' ILLINOIS.

INSU LATOF! Specification of Letters Patent.

Patented Jan. 1, 190'?.`

nplicstion-led February 7 1.906. Serial No. 299.983.

To (LIZ wlw/'11, llt 'ln/wy concern:

Be it known that I, ALFnED'JoHN'soN, a citizen of the United States, residing at* Quincy, in the county lof Adams and State of Illinois, have invented new and useful Improvements in insulators, of which the following is a specilication. f-

'lhis invention relates to vinsulators for holding and supporting electrical conductors-,1

, hereinafter more fully described, illustrated,

point with and claimed.

Inthe accompanyingdrawings, Figure 1 is a sectional viewol an insulator embodying the present invention extending transversely of thereversible seat block or step. Fig. 2 is a sect ional viewol the same, taken at right angles to Fig. 1. Fig. 3 is an outer face view of the base member of the insulator. Fig. 4 is an inner ilace view ol the cap member or clamp. Fig. 5 is a detail perspective view of the reversible seat block or clamp. Fig. 6 is a face View of the'rear side ofthe base.

',lhe insulator contemplated in this invention con'iprises, essentially, a base 1, which is chambered out, as shown at 2, to receive the anchor-plate and seat-block hereinafter particularly described. This base may be cylindrical or of any other desired shane in crosssccl ion, being, however, cylindrical under the preferred embodiment of this invention. Within the base 1 the latter is provided with a rliainetrically-disposed recess 3, in which is placed an anchor-plate 4 of suitable thickness, the same being provided with a hole to' receive an attaching-screw 5, the head of which bears against the plate 4 and the shank of which extends through a corresponding opening in the back of the base 1 and beyond the same, so as to enter a side wall or ceiling or other support 6 fo`r fastening the base to such support, as clearly shown in Figs. 1 and 2. The plate 4 is also provided at another a' threaded hble 7, and in yline therewith the base is formed `with an opening 8, the said openings being intended to receive the inner threaded end of a clamping-screw 9, which holds the cap member of the device l in place. The insulator also comprises a clamping-cap 10, of porcelain or other non-l conducting material, which corresponds in shape to the cross-sectional shape of the base 1 and is provided with an opening for the clamping screw-bolt 9, which passes therethrough, as shown in Fig. 1 and engages the anchoring-plate 4 for holding the 'clampingcap firmly in place against the base. base is further provided with a diametrical recess 11, extending entirely therethrough and opening out at opposite sides thereof,

and wit-hin said recess 11 is arranged a reversible four-sided seat block or step Y12,

material, the lenuth of which is approximately e ual to the length oi the recess 11. This seatlblock is provided in each of its flat sides with a groove l13,v and the several grooves 13 are oi different sizes and depths to acconnnodate conduct-ors or wires of different'sizes and having different amounts of insulation. One or more of the grooves may be left perfectly smooth, as shown in Fig. 5', while the remaining grooves may be serrated or provided' with transverse teeth 14, as

The

-made of porcelain or other non-conducting shown. in the same ligure, so as to obtain a `Ilrm gr1p\on t-he Wire in connection with the clamping-cap 10, which is provided in its inner face with a corresponding groove 15, either with or without transverse serrations or teeth 16, as shown in Fig. 4. When the cap 10 is screwed firmly into place, the wire or (.lect-rical conductor shown at 17 is clamped irinly between said cap and the reversible seat block or step 12, and thus held and prevented from slipping longitudinally, this being accomplished Without bending or crimping the conductor or having to secure the sameto the insulatorby auxiliary ties of any kind.

The clamping-cap 10 is provided upon its inner side with 18, through which a hole,19 1s formed for the passage of the clamping screw-bolt 9. The I ug 18 forms an interlocking projection which rests in a notch or :mortise 20, formed in opposite corners of the block 12. It is necessary to form the notches 20 only in diagonall op osite corners, for the reason that the blocli 12 may be turned end for end ne matter which groove 13 is presented to 'conductor-Wire,

so as to bring one ofthe notches;

TOO

an inwardly-projecting lug 2O into position to ne engaged by the stopn i lug 18, which thereby scts to prevent longi tudinel nioveinent oi Jrhe bleek l2 .Wh en suhjeoted to excessive iengthwise strain. The rear inner ieee of the base i is preferably provided with projecting spurs 2l to ehi-:iin e more positive grip or heid on t}ie`surieoe 6, to which the insulator es e Whoie is secured.

Frein the foregoing description it will he seen that the bese ot the insulator is secured t0 its support independently of the clampingoap and reversible seat-block, thus enebling the clamping-oep to he removed Without di splacing the bese, and also enabling lthe sent block or step to he removed end reversed end Vfor end or turned over so es to present env desired groove for the reception of the oonductor or Wire. When the oep is returned to its place and firmly seeuredby ineansof the bolt 9, the Wire or conductor is irinly clamped between the csp and the hloek and held-against movement in either direction.

1.111 an insulator, e bese, ineens for securing seid bese to e suitehle support, e reversible seet-hiock mounted in the bese, end. a` clamping-cap lying opposite the seat hlooir. or step, provided with Ineens for securing the seme to the hase.

2. In an insulator, e ohonneled-base,nieens for securing said hose to a, suitable support, e reversible sest-hlock mounted in' the ohenneled. portion of the bese yand provided with conductor-grooves in tWo or more tenes thereof, and s clamping-oep having ineens for securing the seine to the hose and adapted 'to' clamp the conduct-or against the seat-block.

3. in en insulator, a channeled hase, en

anchor-plate mounted therein, en attachingsereiv passing through the anchor-plete and onse for securing the bese to a suitable sup-- port, 'a seetiiorefeonduetor, s Clamping-oep adopted to elernp the conductor ngz-inst the sent or step, and n, 'clamping-bolt 'passing through said csp ond engegingsthreeded .inorenotches, and e eiempingeap having means jfor securing the sinne to the hase, seid cap being provided with a lug which engages one of the notches in the seatblock, substantially es and for the purpose described.

(i in en insulator, the Combination With a hase, 'end ineens for securing said bese t-o-iaJ suitable support, of a reversible senthlock having e plurality of feces provided vth 'grooves of different sizes to receivee conduetor, ende clamping-oep secured tothe bese and adapted. tog-clamp seidl conduotor Within one of said grooves inl the' reversible seat-bleek.

In testimony whereof l aiiX my signature in presence et two Witnesses. .y

V ALFRED JOHNSN.

liilitnesses z JAeoB R. WIBLE, E. P. Qseoon. 

